1 //===---- OrcMCJITReplacement.h - Orc-based MCJIT replacement ---*- C++ -*-===// 2 // 3 // The LLVM Compiler Infrastructure 4 // 5 // This file is distributed under the University of Illinois Open Source 6 // License. See LICENSE.TXT for details. 7 // 8 //===----------------------------------------------------------------------===// 9 // 10 // This file forces OrcMCJITReplacement to link in on certain operating systems. 11 // (Windows). 12 // 13 //===----------------------------------------------------------------------===// 14 15 #ifndef LLVM_EXECUTIONENGINE_ORCMCJITREPLACEMENT_H 16 #define LLVM_EXECUTIONENGINE_ORCMCJITREPLACEMENT_H 17 18 #include "llvm/ExecutionEngine/ExecutionEngine.h" 19 #include <cstdlib> 20 21 extern "C" void LLVMLinkInOrcMCJITReplacement(); 22 23 namespace { 24 struct ForceOrcMCJITReplacementLinking { 25 ForceOrcMCJITReplacementLinking() { 26 // We must reference OrcMCJITReplacement in such a way that compilers will 27 // not delete it all as dead code, even with whole program optimization, 28 // yet is effectively a NO-OP. As the compiler isn't smart enough to know 29 // that getenv() never returns -1, this will do the job. 30 if (std::getenv("bar") != (char*) -1) 31 return; 32 33 LLVMLinkInOrcMCJITReplacement(); 34 } 35 } ForceOrcMCJITReplacementLinking; 36 } 37 38 #endif 39
